I-trbbicatob



B. H. SKELLY.

FORGE FEED LUBRICATOR.

APPLIUAHON FILED NOV. 14. l9l8.

1,317,901. PatentPd Oct. 7, l9l9.

2 SHEETS SHEET I.

61mm: 41 to:

UNITED S AT S PMENT ornlcn.

warm 3. smut or name/arena, CONNECTICUT.

lotion-ran!) LUBBICLTOB.

Specification of Letters Patent.

Patented Oct. '1, 1919.

Application filed November 14, 1915. Serial No. 3,438.

To all whom it may concern;

Beit known that I, BERNARD H. SKELLY,

. a citizen of the United States, residing at lient features of construction the city of Bridgeport, in the county of Fair-field and State of Connecticut, have invented certain new and useful 1m rovements in Force-Feed Lubricators; and fdo declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to certainnew and useful improvements in a lubricator of the type disclosed and claimed in my Patent No. 1,268,869, issued June 18, 1918.

In my former construction the operation efiected simultaneous lubrication of all the hearings to which it was connected, but in a mechanism, such as the automobile, there are certain bearin which require lubrication more frequent y than others and for this reason it is preferable to have a selective operation for the lubricator.

The principal object, therefore, is to provide an improved lubricator having a plurality of independent sets of pum s operable in a selective manner by indepen ent instrumentalities so that different bearings may be oiled at varying intervals.

The invention further resides in a lurality of separate sets of pum c lin ers each set having independent ahne sprin retracted plungers o erable therein, eac series of plungers beln driven by a compound cam member whose cam parts are relatively ofl'set and having the same axis of revolution so that the upward presslll'fl of half of the plungers against the cam element will be counteracted by the pressure of the remaining plungers against such element.

Further, the invention resides in the saand the arrangements and combinations of parts hereinafter described and claimed whereby a great saving in the material and labor of manufacture willbe efi'ected.

In the drawings;

Figure 1 through the improved lubricator;

Fig. 2 is a transverse section thereof on line 2-2 of Fig. 1.

Fig. 3 is a top plan view of the reservoir and the contained cylinder blocks, and

Fig. 4 is a detailed perspective of one of the cams,

is a vertical longitudinal section.

Referring more particularly to the drawings, the casing or reservoir 1 is e nipped with a cover plate 2 by the removal 0 which accessmay be obtained to the interior workinimechanism of the lubricator.

pair of cylinder blocks 3 is preferably formed integral with the opposite side walls of the reservoir and is spaced oil the bottom to provide ample passage therebcneath for roper circulatlon of the lubricant to the inets 4 of the pump cylinders 5. The cylinders are bored vertically through the top faces of the cylinder blocks and have thelr bottoms counterbored to form valve seats for the valves 6 and also toiprovide said inlets 4. Laterally and outwardly from each cylinder leads an outlet port 7 adapted to receive a valved nipple (not shown) for connection with the respective bearings of the mechanism to be lubricated.

Plungers 8 are vertically operable in the cylinders and are normally held in elevated osition by the encircling coiled springs 9 interposed between the heads 10 of the plungers and seats 11 on the upper faces of the cylinder blocks.

Arranged above each block and its plungers is a cam shaft 12 having its ends-journaled in the end walls of the reservoir and extended to provide wrench holds 13. A pair of cams 14 and 15 are carried on each shaft, said cams being longitudinally and eccentrically bored to'receive the shaft and are fixed theron by the transverse key pins 16. The cams are relatively at an angle of approximately 180 and one cam 14 is preferably formed with a concave seat or recess 17 in an end for receiving the adjacent end of cam 15, as depicted in Figs. 1 and 4. This interlock between the ends of the cams provides a positive connection and relieves the key dpins 16 from some of the strain they woul otherwise be subjected to, but, of course, these cams 14, 15, may be formed into al, if desired.

As shown in the drawing there are two independently operable sets of alined plungers 8, which are always held against their re spective cams by the coiled expansion springs. Half of the plungers of a set thus tend to lift or rotate the contacting cam in one direction, as indicated by cam 15 in Fig. 1, but this tendency is overcome or resisted by the action of the companion plungers in the set which tend to rotate the ad oining portion of the cam in the opposite direction This counteraction is quite essential in this type of lubricator, for the reason that the wrench is removed and replaced frequently durin a complete cycle, and, therefore, shoul a sin is cam uniformly positioned at one angle is employed the action would common to all plungers of a set, and every time the wrench was removed from its hold the cam would be forced back and no pumping action of the plunger-s would result. This improved arran ement, therefore, renders the operation unlform and easy by reason of the fact that one part of the cam and its under set of plungers would be lowerin while the companion art of said cam an its set of plungers won (1 be rising.

The cylinder blocks are here depicted integral with the reservoir but obviously they may be separate therefrom. Various other changes may also be resorted to in carrying out the invention, as defined by the appended claims into actual practice.

What is claimed is:

1. A lubricator comprisin a reservoir, a cylinder block structure t erein having alincd cylinder bores provided with inlet and outlet ports, spring retracted plungers operable in the cylinders, and relativelyimmovable counterbalanced cams for actuating the plungers, said cams having the same axis of revolution and adapted to be revolved always at a constant speed.

2. A lubricator comprisin cylinder block structure t erein formed with alined pump cylinders, plungers operable in the cylinders, a air of cams rigid together and relatively oii set to depress the respective plungers therebeneath successively, and springs which constantl force said plungers upwardl against sai cams, whereby said'cams will ave a uniform speed of revolution and. the action of one cam against the plungers will be counterbalanced and assisted by the action of the plungers against the other cam.

3. A lubricator comprising a reservoir, a cylinder block structure therein formed with alined pump cylinders, lungers operable in the cylinders, a plurtility of revoluble cams relatively immovable and adapted to be revolved always at a constant speed, said a reservoir, :1

cams being in relative an lar relation and having the same axis 0 revolution, and springs which normally tend to elevate the p lingers and to keep 1: new in constant contact with said cams, whereby any tendency toward intermittent acceleration of the speed of the cams caused by the spring actuated plun ers is counteracted.

4. A In ricator comprising a reservoir, 9. cylinder block structure therein formed with alined pum cylinders, plungers operable in the cylindiers, a shaft arranged above the plungers, and a plurality of cams keyed to the shaft in relatively angular relation to permit of selective actuation of the plungers, one cam having a concave seat formed in one end to receive the opposing end of the adjacent end to thereby interlock the cams.

5. A lubricator comprising a reservoir, a series of alined cylinders provided with inlet ports communicating with said reservoir and outlet ports for communication with various bearings to be lubricated, spring retracted plungers operable in the cylinders, and cams that are permanently fixed and relatively offset with respect to each other, one cam always operating to depress the plungers t-herebeneath while simultaneously the plungers beneath the other cam are operating against the latter with a tendency to elevate it.

6. A lubricator oomprisin a reservoir, a cylinder block structure tierein havin alincd cylinders provided with inlet and outlet ports that communicate respectively with the reservoir and with suitable distributing pipes, spring retracted plungers operable in the cylinders, and relatively fixed and offset cams havin the same axis of revolution and always in contact with said plungers, one cam always operating with constantly increasing radii against one set of plungers to depress the latter while simultaneously the other set of plungers is always being forced upwardly against the other cam at constantly decreasing radii of the latter, whereby said cams operate as auxiliaries one'to the other in the depression of the plungers.

In testimony whereof I afiix m signature.

BERNARD H. t KELLY. 

